Cut-off mechanism.



No. 739,555. Y I PATNTBD SEPT.22, 1903. ST. MURUHIE.

AGUT-0H MBGHANISM. APPLICATION HLM) JULY?. 1699.

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www y TM y www@ gy @gm/1, /MWWM Y PATBNTED SEPT. 22, 1903.A

s. T* Mmmm.v GUT-OPF MBGHANISM. @PYLIUATIGN FILED JULY 3, 1899.

N0 MODEL.

s Perera co mroumo.. wASHmnTM n c UNITED STATES retreated september 22, 190s.

'PATENT OFFICE. v

SYLVANUS T. MURCl-IIE, OF BATAVIA, ILLINOIS, ASSIGNOR `TO THE UNIONV PAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CUT-OFF MEcHANlsM.

SPECIFICATION forming part Of Letters Patent No. 739,555, dated September 22, 1903.

' Application tiled .Tilly 3, 1899. Serial No. 722,628. (No model.)

To caf/ZZ whom. it may concern.:

Beit known that I, SvLvANUs T. MURCHIE,

of Batavia, in the county of Kane and StateA of Illinois, have invented certain new and useful Improvements in Cut-Od Mechanism, of

which the following is a specification.

This invention relates to a cut-,oft mechan ism for use in apparatus operating with air or other iiuids under pressure, and is particuro larly adapted for use in connection with air.

suction rolls, such as are employed in papermaking, bag-machines, and the like.

An illustration of the class of machinesA to which my invention is particularly applicable I5 is the paper-bag machine shown in Letters Patent No. 585,280, granted tome .Iune 29, 1897. In the paper-bag machine of that patent a dat tube of paper, having tucked-in sides, has its leading end opened by passing zo it between two perforated rolls or cylinders `from whose interior the air is exhausted, the exhaust being cut off at suitable intervals by means of a gate or valve in the trunk or pipe leading to the exhaust-fan. The gate or valve 2 5 is there shown as'being operated bya rod and has a rocking or oscillating movement.

M y presentimprovementthe cut-oft mechanism-is of a rotary type; and it consists, es'- sentially, in the combination, with the pipe 3o through which the airor other lquidis moved, of a rotary valve or gate in the form of a disk, having a slot or aperture therein concentric with the axis of thedisk, with suitable gearing for rotating the disk, so as to cover and uncover the pipe through which the air is passing, thus cuttin g off the exhaust or blast, as the'case may be, at regularintervals, which may be timed so as to operate in due order and relation to the other parts of the appa- 4o ratus.4

In the accompanyingdrawingsIhaveshown my invention embodied in a cut-olf mechanism for controlling three pipes or passages, the several cut-off valves being geared to operate in unison. A

In the drawings, Figure 1 is an elevation showing the valve-disks and their gearing in edge view and the pipes and an air-box with which they connect. Fig. 2 is a side view of 5o the parts shown in Fig. 1, showing an end view of the pipesand a side viewof the valve-disks" and gears. Fig. 3 is a sectional elevation onf line 3 3 of Fig. 1 looking toward the valve-V disks.

In the present embodimentot theinvention three suction-pipes 5, 6, and 7 are shown, all of whichconnect with a common air-box 8, having a suction connection or dange 9'. With the pipes 5, 6, and 7 are connected other pipes 10, 11, and 12,`respectively, which may be in communication with suction -rolls, suctionboxes, or other chambers from which air is exhaustedor .into which it is delivered under blast. The pipes 5,6,and 7 are interrupted or cut across between their ends, the outer ends 53, 6?, and 7 being supported b v the standard 13, which also affords a support for studs 14, carrying pinions 15, 16, and 17, and valve-disks 418, secured by collars 19 and nuts 20. The valve-disks 18 may 7c be thin metal plates and are each provided with apertures 20a concentric to their axes. The valve-disks are arranged with such reference to the two sections of the suctionpipes that the apertured portions of the disks p will register with the bore of said pipes during each complete rotation of the valve-disk. The disks may all be driven in unison from the pinion 20, enmeshed with the pinion 15, driving the intermediate gear 21, which in 8o turn, through the pinion 16 .and intermediate gear 22, ldrives the pinion 17. As shown in Figs. 2 and 3, the pipe 'js cut o by the solid portion of the valve 18, while the pipes 6 and 7 are in open .communication through 85 the aperture in their valves 18. The pipesections 5 5fL abut so closely against the opposite sides of the revolving disk as to make a sufficiently close joint, the lateral edges or walls of the aperture extending practically into the bore of the pipe, so as to maintain the joint. K Y p While I have shown a series of cutos geared together and While such application would be particularly adapted to a machine 95 using a number of suction-rollssuch, for example, as the machine shown in my patent above mentioned-I do not limit my invention to the employment of a series of cut-ois geared or otherwise connected or coperative. roo

When the cut-off mechanism is used in, say,

a bag-machine, its gear may be driven in unison with and in due relation to the functions of the suction-cylinders, which open the leading end of the tube, and obviously this form of cut-orf is particularly adapted to be used in all situations Where the effect or function of a fluid under pressure is to be temporarily arrested and in due relation to some moving part of the machine. Obviously, also, the cutoft could be used in conjunction with an airblast as well as with suction. The disks and gears are preferably loosely mounted upon the shortstuds or shafts, and the nuts offer means for clamping them in any desired position of adjustment. By reference to Figs. 2 and 3 it will be seen that the upper valve l is in position t0 cover the passage, While the two lower valves are in such position that' their apertures register with the air-passages. These positions may be varied or altered at will.

Without therefore limiting my invention to precise details of construction, arrangements of parts, or specific uses, I claim- A cut-olf mechanism comprising in combination, a pipe or passage having its body portion intersected intermediate its length, the opposing ends of sa'id body portion closely adjacent to, and in direct alinement with, each other, a disk of substantially uniform thickness mounted upon an axis to rotate in the plane of, extend into and substantially occupy the space formed by, said intersection, its sides contiguously engaging said opposed ends, an aperture in said disk eccentric to its axis of rotation intermittently registering with, and directly continuing, the passage of the pipe, and means for rotating said disks, whereby the passage through the pipe is alternately opened and closed and the pipe is at all'times substantially closed against escape from, or egress to, its interior at said intersection, substantially as shown and described.

SYLVANUS T. MURCHlE. 

